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howtos:hardware:cpu_frequency_scaling [2013/12/16 22:32 (UTC)] – [Example] metaschimahowtos:hardware:cpu_frequency_scaling [2013/12/16 22:36 (UTC)] – [Further reading] metaschima
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 ===== Checking the CPU frequency settings ===== ===== Checking the CPU frequency settings =====
  
-Slackware comes with the cpufrequtils package which helps to configure frequency scaling in an appropriate manner. You can check the settings on your system with the command +Slackware comes with the ''cpufrequtils'' package which helps to configure frequency scaling in an appropriate manner. You can check the settings on your system with the command 
 <code bash>cpufreq-info</code> <code bash>cpufreq-info</code>
  
-Or using sysfs: +Or if you don't have the package installed: 
-<code bash>cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor</code>+<code bash>cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor 
 +cat /proc/cpuinfo</code>
 where "cpu*" is the CPU you want the info on, for example cpu0. where "cpu*" is the CPU you want the info on, for example cpu0.
  
  
-===== The configuration ===== 
-The cpufrequtils package provides two commands. With ''cpufreq-info'' you can find out which governor is configured and also some other information, for example, the available frequencies for your processor. 
-The ''cpufreq-set'' command can be used to set the appropriate governor. 
  
 ===== Setting the CPU frequency settings ===== ===== Setting the CPU frequency settings =====
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 as long as the interface exists. as long as the interface exists.
 ===== Further reading ===== ===== Further reading =====
-I recommend reading the manpages for cpufreq-info and cpufreq-set. Also you can read the relevant documentation in the kernel sources.+The manpages for ''cpufreq-info'' and ''cpufreq-set'' are useful.  
 + 
 +The kernel ''Documentation/cpu-freq'' directory contains detailed explanations of CPU frequency drivers, governors, and other settings.
  
 A decent explanation of P states and how they are handled in the kernel: https://plus.google.com/+ArjanvandeVen/posts/dLn9T4ehywL A decent explanation of P states and how they are handled in the kernel: https://plus.google.com/+ArjanvandeVen/posts/dLn9T4ehywL

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